Hàm số y = tan2x có tập xác định là: 

Trong tự nhiên, magnesium có 3 đồng vị bền là ²⁴Mg, ²⁵Mg và ²⁶Mg. Phương pháp phổ khối lượng xác nhận đồng vị ²⁶Mg chiếm tỉ lệ phần trăm số nguyên tử là 11%. Biết rằng nguyên tử khối trung bình của Mg là 24,32. Tính % số nguyên tử của đồng vị ²⁴Mg và ²⁵Mg.

1. % ²⁴Mg = %.

Nhà thơ nào KHÔNG thuộc phong trào Thơ Mới giai đoạn 1932 – 1945?

Sự khác biệt giữa mạng LAN và Internet thể hiện ở yếu tố nào sau đây?

Read the following advertisement and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 1 to 6:

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Mệnh đề nào là phủ định của mệnh đề: “\(\exists x \in \mathbb{R}|{x^2} - 3x + 2 > 0\)”?

How do we know who the woman in the Mona Lisa is?

Với giá trị nào dưới đây của \(m\) thì hàm số \(y=\text{cos}2x+mx\) đồng biến trên \(\mathbb{R}\)?

Một vật đang trượt trên một mặt phẳng, khi tốc độ của vật giảm thì hệ số ma sát giữa vật và mặt phẳng

“Vùng đất này không chỉ tốt cho lúa.”

Đây là câu:

You need more exercise, you should _________ golf.

Cho phương trình \(\sqrt {{x^2} + 3}  = \sqrt {2x + 6} \). Chọn khẳng định đúng:

Hình bên dưới trình bày một sơ đồ phân loại đồng xu trong máy bán hàng tự động. Có một máng nghiêng cho đồng xu chuyển động từ khe thả đồng xu đến nam châm điện. Nếu không có lực nào cản chuyển động của đồng xu hoặc lực cản rất nhỏ thì đồng xu sẽ đập vào khối chắn, rơi theo hướng bị loại, không được chấp nhận để mua hàng.

Phát biểu nào sau đây là đúng? 

A human-like robot that can drive a car could one day be used as a chauffeur, though its creator admits that this may take at least 50 years.

Most driverless cars work very differently to a human driver, using artificial intelligence and custom mechanical systems to directly move the steering wheel and pedals. This approach is much more efficient and simpler than using a robot to drive, but it is also specially made for each particular car.

Kento Kawaharazuka at the University of Tokyo and his colleagues have developed a human-like robot, called Musashi, that can drive a car in the same way as a human. It has a human-like “skeleton” and “musculature”, as well as cameras in each of its eyes and force sensors in its hands and feet. Artificial intelligence systems work out what actions are needed to drive the car and react to events that often happen on roads such as traffic lights changing colour or a person stepping in front of the car. The robot can only perform a limited range of driving tasks at present, such as going forward in a straight line, taking a right- hand turn, and moving at speeds of around five kilometres per hour on non-public roads. “The speed of the pedal or the velocity of the car is not high. Also, the handling of the car is not fast compared to human beings,” says Kawaharazuka.

It seems that a robot at the controls of a car, operating in real traffic conditions and in total safety, is not something we are likely to see soon. As mentioned earlier, it could be decades before a robot could really step into the driver’s seat.

Which of the following would the author most likely support?

Hiện nay, nguồn động lực được sử dụng phổ biến là?

Ngành nào dưới đây được đánh giá là "ngành học của tương lai"?

Hàng hoá bán được trên thị trường nghĩa là chủng loại, hình thức, chất lượng hàng hoá đó đáp ứng yêu cầu của xã hội là nội dung thể hiện chức năng gì của thị trường?

Read the passage carefully.

1. It is estimated that about 40 per cent of the world's population use social media, and many of these billions of social media users look up to influencers to help them decide what to buy and what trends to follow. An influencer is a person who can influence the decisions of his or her followers because of his or her knowledge or special knowledge in a particular area, e.g. fashion, travel, or technology. Influencers are now seen by many companies as a direct way to customers' hearts. Brands are now asking powerful influencers to market their products. With some influencers charging up to $25,000 for one social media post, it is no surprise that more and more people are keen to become influencers, too. If you are one of them, then here are five tips on how to do it.

2. Choose your niche: What is the area that you know most about? What do you feel most excited talking about? Find the specific area that you are most interested in and develop it.

3. Choose your medium and write an interesting bio: Most influencers these days are bloggers and micro-bloggers. Decide which medium – such as your own online blog, Instagram or Snapchat – is the best way to connect with your followers and chat about your niche area. When you have done that, write an attention-grabbing bio that describes you and your speciality area in an interesting and unique way. Make sure that people who read your bio will want to follow you.

4. Post regularly and consistently: Many influencers post daily on their social media accounts. The more you post, the more likely people will follow you. Also, make sure that your posts are consistent and possibly follow a theme.

5. Tell an interesting story: Whether it is a photo or a comment that you are posting, use it to tell a story that will catch the attention of your followers and help them connectwith you.

6. Make sure people can easily find your content: Publicize your posts on a variety of social media by hashtags and catchy titles to make sure that they can be easily found. There is no point writing the most exciting blogposts or posting the most attractive photographs if no one is going to see them.

7. Most importantly, if you want to become a social media influencer, you need to have patience. Keep posting and your following will gradually increase. Good luck!

Choose an option (A, B, C, or D) that best answers each question.

In paragraph 1, what does the word them refer to?

Lực cản của chất lưu có đặc điểm:

Cặp số nào sau đây là nghiệm của bất phương trình \(3(x - 1) + 4(y - 2) < 5x + 3\)?